This little book is the Word of God. When we first hear the truth—when we first eat it—it is marvelous and exciting to us, and we try to devour even more of it. But as we begin to make it a part of our lives, begin to assimilate—digest—it, we find that putting it into practice is not always easy. Sometimes it is downright painful!
Jesus says it is "the strait way, the difficult way, and few there be that find it" (Matthew 7:13-14). In addition, we find that the Word of God contains things within it that are very bitter indeed in terms of what it says in Revelation—terrifying, painful, oppressive, horrible things described in symbolic language. God is not at all pleased that such things must happen.
And, of course, Scripture can bring upon us a great deal of sadness as well. It may taste good going in, but once in, we find it can be very bitter in application to our lives.
John W. Ritenbaugh
Revelation 10 and the Laodicean Church